/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.novelot.plugin.allinone.util;

import java.util.concurrent.Executor;
import java.util.concurrent.Executors;


/**
 * Global executor pools for the whole application.
 * <p>
 * Grouping tasks like this avoids the effects of task starvation (e.g. disk reads don't wait behind
 * webservice requests).
 */
public class AppExecutors {

    private static AppExecutors sInstance = new AppExecutors();

    public static AppExecutors getInstance() {
        return sInstance;
    }

    private final Executor mDiskIO;

    private final Executor mNetworkIO;

    private final Executor mMainThread;

    private AppExecutors(Executor diskIO, Executor networkIO, Executor mainThread) {
        this.mDiskIO = diskIO;
        this.mNetworkIO = networkIO;
        this.mMainThread = mainThread;
    }

    private AppExecutors() {
        this(Executors.newSingleThreadExecutor(), Executors.newFixedThreadPool(3),
                Executors.newSingleThreadExecutor());
    }

    public Executor diskIO() {
        return mDiskIO;
    }

    public Executor networkIO() {
        return mNetworkIO;
    }

    public Executor mainThread() {
        return mMainThread;
    }
//
//    private static class MainThreadExecutor implements Executor {
//        @Override
//        public void execute(@NonNull Runnable command) {
//            mainThreadHandler.post(command);
//        }
//    }
//
//
//      private static boolean isMainThread() {
//        // FIXME: There should be a better way to do this.
//        // Would also be nice to have something that would work across Binder calls.
//        Looper looper = Looper.myLooper();
//        return looper != null && looper == Looper.getMainLooper();
//    }
}

